Artificial denture.



(No ModeI.)

Z i i r I f F r r I 7 F r r I f r I I I 5 F Patented Sept. l7, I90I. J. C. SCIIRUEDER'& G. P. SPANGLER.

ARTIFICIAL DENTURE.

(A pplication filed Mar 23, 1801.

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Maine/1 30 UNITED STATES PATENT OFFICE.

JOHN C. SCHROEDER AND GEORGE P. SPANGLER, OF YORK, PENNSYLVANIA.

A-RITIFICIAL DENTURE.

SPECIFICATION forming part of Letters Patent No. 682,756, dated September 17, 1901.

Application filed March 23, 1901. Serial No. 52,643. (No model.)

To all whom it may concern.-

Be it known that we, JOHN C. SCHROEDER and GEORGE P. SPANGLER, citizens of the United States, residing at York, in the county of York and State of Pennsylvania, have invented certain new and useful Improvements in Artificial Dentures, of which the following is a specification.

Our invention relates to artificial dentures; and it consists in so constructing the body portions with undercut or inwardly-expanded recesses as to receive anchoring-pieces to which the the ends of metallic pins of cheap metal may be soldered, as fully set forth hereinafter and as illustrated in the accompanyifig drawings, in which- Figure 1 is a sectional view of an artificial denture consisting of a single tooth showing the pin applied and secured to the metallic anchoring-piece. Fig. 2 is a rear face view of Fig. 1; Fig. 3, a View showing a different form of recess and a pin provided with a sleeve. Figs. 4 and 5 are views illustrating the method of securing a cheap metal anchoring-piece in the recess. Figs. 6 and 7 are views showingin section another form of anchoring-piece. Fig. 8 is a perspective view showing a pin with an anchoring-piece secured to the inner end thereof.

The body A of the artificial denture (which may be a single tooth or a block of connected teeth) is constructed in any suitable manner, so as to have one or more recesses or openings so, each of which is enlarged or undercut at the inner end. At the enlarged end of each recess there is placed a plate or anchoring-piece a, of metal, such as German silver or provided with a head or may be otherwise formed for firm attachment to the body of rubber or other material constituting the plate.

The plate material may extend into sleeve 0, which may be tubular or consist of wire Wound spirally.

By the above arrangement We are enabled to avoid the necessity of making use of platina for the purposes of securing artificial dentures to plates, avoiding the expense of the plat-ina and permitting the use of heavier pins than could possibly be employed commercially if platina were used.

Any suitable means maybe employed for inserting and securing the metallic anchoring-piece at the enlarged end of the recess or opening. Forinstance, a metallic cup (1, of a diameter to pass through the contracted portion of the opening, may be inserted through the same and placed at the bottom of the opening in the position shown in dotted lines, Fig. 4. Then by pressure upon the convex face of the cup by means of a punch c, Fig. 5, the cup may be flattened out and expanded to practically fill the larger diameter of the opening. Instead of an anchoring-piece in the form of a cup it may be in the form of a tube f, slit at its lower end and the slit portion slightly expanded, so that when the tube is forced against the bottom of the recess the slit portions will spread outward, forming a flange g, as in Fig. 7. Whatever may be the method of the introduction of the anchoringpiece a it will occupy a position at the end of the pin when soldered thereto, as indicated in the perspective view, Fig. 8.

Without limiting ourselves to the precise construction and arrangement of parts shown, we claim as our invention- 1. In an artificial denture, a body portion 5 having an undercut recess, combined with a metallic anchoring-piece distended in said recess and a metallic pin extending into the recess and soldered to said anchoring-piece.

2. The combination with the body of an I00 artificial denture having an opening enlarged names to this specifichtion in the presence of at the inner end, of a metallic pin extending two subscribing witnesses. into said opening and surrounded by a sleeve, JOHN C SCHROEDER and a metallic anchorin -piece distended at the inner end of said opening soldered to the GEORGE SPANGLER' ends of the pin and sleeve, substantially as Witnesses: set forth. BOYD O. WILKINSON, In testimony whereof We have signed our HENRY R. KRABER. 

